MIG welding cast iron exhaust manifold.

[aametalmaster]

You guys know how hard it is sometime to weld an old junky exhaust manifold? I have done hundreds of them over the last 34 years most of them stick with Ni rod and some brazed. Some worked well some didn't. So move ahead 30 years i picked up some Crown Alloys .035 44-30 mig wire for cast iron. Its used with Argon and works great. This manifold on my Geo Metro had a crack and it has been hissing for 4 months or so. I drove the car around to warm it up since i wasn't planning to remove it and hit the crack with a die grinder and a stone. Then i dabbed the mig wire in the clean area and triggered it right up the crack. It took about 30 seconds and sealed the crack right up. I let the car run for a few minutes and then let it cool. So far so good. The 2# spool is 75 bucks and i wanted to try it out for a test...Bob
http://www.crownalloys.com/TechSheet...ew_Warning.pdf

[Daniel]

Looks like a miracle wire for cast iron, looks like it does well, with not so clean parent metal. Did you notice any porosity anywhere in the weld?
I might have to get myself a roll.

[aametalmaster]

The cast has to be clean. I ground where i was going to weld with a die grinder and a stone to shiney metal. The wire stuck perfect to that area. Nope no pin holes. It could have been better if i had more then 2" of room to work in but it was fine...Bob

[metal-doctor]

Keep us posted on how it lasts. New technology is great. Good job , Wayne

[aametalmaster]

I will watch it since its on my daily driver. I didn't want to try it on someone elses ride first...Bob

[jpence38]

That is some awesome wire. I bought a 10# spool and it was worth every cent.
It is so nice to be able to just spot it in quick like that. Much more control than rod.